How do you test a method before using?

I ran into a small problem with loading my game. If one of the items (Int, strings, bool) is not found while deserializing the save data it comes back with an error and stops. This isn't too big of a problem since the only reason it's not finding the items is because I'm editing the game data, but I want to test the method before it starts. That way if it does come back with an error it simply doesn't load it and starts a new save.

So in other works how do you test a method before invoking it?

Code (CSharp):

1. if (File.Exists(Application.dataPath + "/SAVE/savedata.moewars"))
2.         {
3.             SaveData.SaveManager.LoadGame();
4.             TimeManager.TimeUpdate();
5.         }

I want it to check if LoadGame() comes back with an error or not.

 

It kind of sounds like you want to use try/catch/finally
https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/try-catch-finally

 

Thanks that helped a lot

 

Just thought I'd add another option: If it's not an exception for the method to fail, you can always return a value from the method indicating it's not ready or failed or what not. Maybe this would be returning an integer, for example, or a bool.